Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/c38a2898db1d
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Merge pull request #25024 from arcturus/bug-1080008

Bug 1080008 - [Contacts] Importing contacts with special characters from Outlook do not appear correctly in contacts list. r=sergi

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https://hg.mozilla.org/integration/gaia-central/rev/637ee7b117c5
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Bug 1080008 - [Contacts] Importing contacts with special characters from Outlook do not appear correctly in contacts list. r=sergi
Bumping manifests a=b2g-bump